what do you guys think of the new 660nm cree leds

Positivity

Positivity

Well-Known Member
That's a good question..lol.

Just looking at the grows going on you can notice a few things.

Higher red proportion will stretch more, but more bud per watt.

630..660..or now 670. Being your light must have some red in it since it's a standalone lower kelvin. I'd do a light 660 and 670.

Or you can do a run with just 670nm and let us all know how it works..lol. Please..haha
 
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pedrovski

Well-Known Member
maybe get another couple of panels built with
1/4 670nm
2/4 3750k
1/4 5000k?
see how they do against my panels with just 3750k i bet this could beat the red white spectrum on the RW-150 LED Grow Light from area 51 as there using 630nm and i think the extra blue in the 5000k would maybe stop stretching
 
Positivity

Positivity

Well-Known Member
pedrovski said:
maybe get another couple of panels built with
1/4 670nm
2/4 3750k
1/4 5000k?
see how they do against my panels with just 3750k i bet this could beat the red white spectrum on the RW-150 LED Grow Light from area 51 as there using 630nm and i think the extra blue in the 5000k would maybe stop stretching
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Any warm color combo will work. I wouldn't get too complicated with it, start with what works the best...3k 3070
 
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pedrovski

Well-Known Member
Positivity said:
Any warm color combo will work. I wouldn't get too complicated with it, start with what works the best...3k 3070
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Still not really convinced by the cxa 3070's. I know they are efficient lights but still feel it's sticking to the hps philosophy of blasting the plants with a much light as possible without necessarily going with the best spectrum as the 3000k do have plenty of 630nm just not much 660nm
 
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pedrovski

Well-Known Member
well im always wanting to try different things, tried and tested is fine for some but i would rather go to try something new as theres always room for improvement on the spectrum maybe adding the 660nm might make for even denser buds, maybe i'll get lucky and get a great spectrum
 
Positivity

Positivity

Well-Known Member
I hear ya...I change my spectrum darn near every run now that I can with a DIY rig.

So where can we get those nice pcbs? Or is it a trade secret?
 
captainmorgan

captainmorgan

Well-Known Member
How are the specs looking on the photo reds? I posted a link about them in Supras CXA thread about 1 1/2 weeks ago,Jeff at Area 51 told me about them.
 
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pedrovski

Well-Known Member
i got the 3 20 led pcbs (100w max each) with the same XTEAWT-02-0000-00000BFF6 leds as the xgs-190 and 5x 60 led pcbs from http://www.sunshineopto.com for $120 to uk so maybe you would get it cheaper to the US as $50 fo the cost was the shipping.
would these XPGBWT-H1-0000-00GE7 go well with the XPEPHR-L1-0000-00901 do you think?
 
Positivity

Positivity

Well-Known Member
Th
pedrovski said:
i got the 3 20 led pcbs (100w max each) with the same XTEAWT-02-0000-00000BFF6 leds as the xgs-190 and 5x 60 led pcbs from http://www.sunshineopto.com for $120 to uk so maybe you would get it cheaper to the US as $50 fo the cost was the shipping.
would these XPGBWT-H1-0000-00GE7 go well with the XPEPHR-L1-0000-00901 do you think?
Click to expand...

I don't see why not, as long as they are binned cree leds. The 670nm red hasn't really been used yet...not that I've seen. You would be in uncharted territory there. 660nm may be a safer bet

Thanks for the links, probably never need to order them but they are a nice option.
 
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pedrovski

Well-Known Member
i just went for them as everyone was having good results with the xgs-190 thought they would compliment my custom chinese 3w led panels till i can afford to get a new panel made with the deep red crees to replace the chinese leds as i would imagine the crees are twice the efficiency just wasn't prepared to pay $475 for them tho. this is what it looks like with 1 of the cree panels with my custom led panels which will help my 2 autos flower in my first attempt at hempy bucket using biobizz nutes
 
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churchhaze

Well-Known Member
I'm personally very interested in them. I'd love to try now. Perfect timing for me as just fished the white cob DIY. 630nm is fine for traffic lights, but 660nm is where you get the maximum Pfr at the canopy level.
 
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pedrovski

Well-Known Member
churchhaze said:
I'm personally very interested in them. I'd love to try now. Perfect timing for me as just fished the white cob DIY. 630nm is fine for traffic lights, but 660nm is where you get the maximum Pfr at the canopy level.
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good to see someone else is thinking of trying these out, what other leds are you going to be pairing the 660nm crees with? just out of curiosity :)
 
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churchhaze

Well-Known Member
I'm going to try using these 4x vero 29 3000k at ~1.1A each. (only 3 in pic, but I have 4 now) Some 660nm leds could make a nice addition, but I should probably just try these out alone first.

IMG_0252.JPG

pedrovski said:
good to see someone else is thinking of trying these out, what other leds are you going to be pairing the 660nm crees with? just out of curiosity :)
Click to expand...
 
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churchhaze

Well-Known Member
Since I'm using a 143V,1.4A mean well driver with a 1.1A string for the cobs, I could probably put 65 or so photo-reds in series string to make use of that unused 0.3A, assuming the driver can actually be run at 100% load for extended periods.

Cree, please make a photo red cob and lose the lens!! I don't think I have the patience to mount and wire 65 leds!
 
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Bueno Time

Bueno Time

Well-Known Member
churchhaze said:
I'm going to try using these 4x vero 29 3000k at ~1.1A each. (only 3 in pic, but I have 4 now) Some 660nm leds could make a nice addition, but I should probably just try these out alone first.

View attachment 3203910
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I think its a good idea to do it that way. That is why even though I had some 450 630 and 660nm LED stars, driver, and heatsinks for most of my last flower run I just ran the 3000k COBs alone to get a baseline of the spectrums capability and the qualities it brings to the table as far as plant growth structure and bud development/frost levels. This coming run though will be supplemented with the 3w LEDs to see the difference.
 
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